Process for preparing an additive for lubricating oils, the additive thus obtained and a lubricating composition containing the additive
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United States of America Patent
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Aug 20, 1991
Grant Date -
N/A
app pub date -
May 9, 1989
filing date -
Oct 3, 1985
priority date (Note) -
Expired
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Abstract
The present invention concerns a process for preparing a basic additive for lubricating oils having an antiwear and detergent effect, the additive thus obtained and a lubricating composition containing the additive. The process consists of contacting an amino-acid in solution or in dispersion in the oil with a detergent, an alkaline-earth metal derivative, carbon dioxide in diluent oil, a hydrocarbon-based solvent, and a polar solvent in the presence of a nitrogen-based basic derivative.
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